What is the cheapest airline that flies from San Juan to London?

JetBlue and British Airways are the most popular carriers operating from San Juan to London

When did momondo last update prices for flights from San Juan to London?

Prices for flights from San Juan to London refresh daily.

How old do you have to be to fly from San Juan to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£156 Cheap Flights from San Juan to London in 2025/26

Q: What is the typical price of a round-trip flight between San Juan and London?

Prices are currently low for flights on this route. Typical prices usually range from £476 to £643. The lowest price recently found on this route was £389.

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Find the cheapest flights from San Juan to London

Round-trip

One-way

Last minute

Cheap return flights

01:05 - 20:40SJU-LHR

14h 35m1 stop

12:00 - 23:57LHR-SJU

16h 57m1 stop

£389Lufthansa

Find Deal

Mon, 6 Oct - Tue, 21 Oct

13:06 - 06:20SJU-LHR

13h 14m1 stop

10:10 - 00:56LHR-SJU

18h 46m1 stop

£400Virgin Atlantic

Find Deal

Wed, 29 Oct - Wed, 5 Nov

18:10 - 16:35SJU-LHR

18h 25m1 stop

11:25 - 19:55LHR-SJU

12h 30m1 stop

£409Iberia

Find Deal

Sun, 18 Jan - Tue, 27 Jan

13:06 - 08:50SJU-LHR

14h 44m1 stop

10:55 - 23:56LHR-SJU

18h 01m1 stop

£419KLM

Find Deal

Tue, 14 Oct - Tue, 21 Oct

14:31 - 09:00SJU-LHR

14h 29m1 stop

10:10 - 00:56LHR-SJU

18h 46m1 stop

£425KLM

Find Deal

Wed, 29 Oct - Fri, 7 Nov

13:30 - 09:20SJU-LHR

14h 50m1 stop

08:30 - 23:57LHR-SJU

20h 27m2 stops

£428United Airlines

Find Deal

Wed, 15 Oct - Wed, 22 Oct

07:15 - 08:45SJU-LHR

21h 30m2 stops

15:50 - 14:12LHR-SJU

26h 22m2 stops

£433Delta

Find Deal

Wed, 29 Oct - Fri, 7 Nov

01:05 - 20:40SJU-LHR

14h 35m1 stop

09:30 - 23:57LHR-SJU

19h 27m2 stops

£449United Airlines

Find Deal

Mon, 13 Oct - Tue, 21 Oct

13:32 - 12:05SJU-LHR

17h 33m1 stop

20:25 - 11:56LHR-SJU

20h 31m1 stop

£466Delta

Find Deal

Wed, 1 Oct - Sat, 11 Oct

18:10 - 10:50SJU-LGW

12h 40m1 stop

11:45 - 19:55LGW-SJU

12h 10m1 stop

£478Iberia

Find Deal

Wed, 18 Feb - Thu, 26 Feb

Delta flights from San Juan to London

Our best Delta deals on San Juan to London flight tickets

Delta

29 Oct

SJU07:15San Juan Luis Munoz Marin Intl

21h 30m

2 stops

LHR08:45London Heathrow

7 Nov

LHR15:50London Heathrow

26h 22m

2 stops

SJU14:12San Juan Luis Munoz Marin Intl

£433

Find similar

Delta

1 Oct

SJU13:32San Juan Luis Munoz Marin Intl

17h 33m

1 stop

LHR12:05London Heathrow

11 Oct

LHR20:25London Heathrow

20h 31m

1 stop

SJU11:56San Juan Luis Munoz Marin Intl

£466

Find similar

Delta

13 Oct

SJU18:00San Juan Luis Munoz Marin Intl

21h 00m

1 stop

LHR20:00London Heathrow

20 Oct

LHR20:10London Heathrow

22h 11m

2 stops

SJU13:21San Juan Luis Munoz Marin Intl

£469

Find similar

Air Canada flights from San Juan to London

Our best Air Canada deals on San Juan to London flight tickets

Air Canada

15 Oct

SJU01:05San Juan Luis Munoz Marin Intl

24h 30m

2 stops

LHR06:35London Heathrow

21 Oct

LHR09:30London Heathrow

19h 27m

2 stops

SJU23:57San Juan Luis Munoz Marin Intl

£467

Find similar

Air Canada

23 Oct

SJU01:05San Juan Luis Munoz Marin Intl

27h 30m

2 stops

LHR09:35London Heathrow

1 Nov

LHR18:00London Heathrow

24h 50m

1 stop

SJU14:50San Juan Luis Munoz Marin Intl

£496

Find similar

Air Canada

22 Oct

SJU01:05San Juan Luis Munoz Marin Intl

27h 30m

2 stops

LHR09:35London Heathrow

3 Nov

LHR11:10London Heathrow

30h 07m

2 stops

SJU13:17San Juan Luis Munoz Marin Intl

£537

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 6/10

01:05-20:40

1 stop14h 35m

London Heathrow

Tue 21/10

12:00-23:57

1 stop16h 57m

£389

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

13:06-06:20

1 stop13h 14m

London Heathrow

Wed 5/11

10:10-00:56

1 stop18h 46m

£400

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 18/1

18:10-16:35

1 stop18h 25m

London Heathrow

Tue 27/1

11:25-19:55

1 stop12h 30m

£409

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 14/10

13:06-08:50

1 stop14h 44m

London Heathrow

Tue 21/10

10:55-23:56

1 stop18h 01m

£419

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

14:31-09:00

1 stop14h 29m

London Heathrow

Fri 7/11

10:10-00:56

1 stop18h 46m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 15/10

13:30-09:20

1 stop14h 50m

London Heathrow

Wed 22/10

08:30-23:57

2 stops20h 27m

£428

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

07:15-08:45

2 stops21h 30m

London Heathrow

Fri 7/11

15:50-14:12

2 stops26h 22m

£433

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 13/10

01:05-20:40

1 stop14h 35m

London Heathrow

Tue 21/10

09:30-23:57

2 stops19h 27m

£449

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 1/10

13:32-12:05

1 stop17h 33m

London Heathrow

Sat 11/10

20:25-11:56

1 stop20h 31m

£466

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Wed 18/2

18:10-10:50

1 stop12h 40m

London Gatwick

Thu 26/2

11:45-19:55

1 stop12h 10m

£478

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between San Juan and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in February. Flight prices, which tend to average around £491, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from San Juan averaging around £491.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £486. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Juan to London for around £779.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £486. Flights in the morning are often more expensive, with an average ticket price of £842.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £604 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £450 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Direct flights	None

There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.

Search flight deals

How far is San Juan to London by plane?
San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 12h 24m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Juan to London?
Prices for flights from San Juan to London refresh daily.
How old do you have to be to fly from San Juan to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Gatwick

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

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Colchester

Worthing

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Hayes

Dartford

Winchester

Hounslow

Stansted

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.